(19)
(11) EP 2 340 871 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
07.09.2011 Bulletin 2011/36

(43) Date of publication A2:
06.07.2011 Bulletin 2011/27

(21) Application number: 10196831.1

(22) Date of filing: 23.12.2010
(51) International Patent Classification (IPC): 
A61N 5/10(2006.01)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME

(30) Priority: 28.12.2009 JP 2009298045

(71) Applicant: RIGHT MFG. CO., LTD.
Itabashi-ku Tokyo 174-8633 (JP)

(72) Inventor:
  • Nagata, Tatsuhiko
    Tokyo 174-8633 (JP)

(74) Representative: Prechtel, Jörg 
Weickmann & Weickmann Patentanwälte Postfach 86 08 20
81635 München
81635 München (DE)

   


(54) Apparatus for limiting irradiation field, and linear-member driving device


(57) An apparatus for limiting an irradiation field includes aperture leaves arranged in a width direction thereof, the aperture leaves being controlled to be unmovable in the width direction and movable in a driving direction substantially perpendicular to the width direction. The apparatus causes the aperture leaves to block radiations emitted by a source so as to provide a desired irradiation area. At least one aperture leaf is a supporting aperture leaf having a groove at a periphery thereof. The apparatus includes a linear member, one end of which is secured to the periphery of the supporting aperture leaf and the linear member engages with the groove. The apparatus also includes a restricting portion to hold the linear member between the restricting portion and the groove such that the supporting aperture leaf is controlled to be unmovable in the width direction and movable in the driving direction.







Search report